Base



FIG. 1 is a front, top perspective view for a base, showing the new design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view, wherein the rear elevation, left side, and right side views are identical thereto;

FIG. 6 is a cross sectional view thereof taken at the line 6-6 of FIG. 3; and,

FIG. 7 is a cross sectional view thereof taken at the line 7-7 of FIG. 3.

The dash-dot-dash broken lines in FIG. 7 represent the boundaries of the claim. 

CLAIM The ornamental design for a base, as shown and described. 